• Journal of Embryo Transfer
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• v.1 no.1
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• pp.59-68
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• 1986

산양의 발정주기의 생리와 조절에 관한 최근 연구 보고들과 한국 재래산양의 대한 이들 연구 결과를 모아 고찰하였다. 온대지역에서 산양의 번식계절은 분명하나 한국재래산양의 경우는 비번식계절이 비교적 짧거나 계절적 무발정율이 낮은 편이며, 비번식계절에는 기능적 황체가 유지되지 않는다. 한국재래산양의 발정주기와 발정지속기간은 타품종과 비슷하며, 발정지속기간의 반복력은 매우 낮으며, 발정주기중의 progesterone과 estradiol-17$\beta$의 소장을 규명하였다. 한국재래산양의 경우 황체기에 PGF2 1-3mg을 투여하면 항체퇴행을 유기할 수 있으나 주기중의 투여시기에 따라 투여후 발정개시 시간에 차이가 있었다. 그리고 pro-gesterone priming후 PGF$\alpha$를 투여함으로써 효과적인 발정동기화를 이룰 수 있었다. 분만후 1개월경과 유상후 12일경에 발정이 재귀되었으며, 첫 발정 후 80%의 산양에서 5-7일의 단발정주기를 나타냈으며, 대부분의 과배란유기 산양에서도 단발정주기를 나타냈는데 이는 황체의 조기퇴행 때문이었다. 초발정후 3-5일에 GnRH를 연속 주사하면 단발정주기의 발생율이 유의적으로 감소되었다.

• Journal of the Korean Data and Information Science Society
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• v.28 no.5
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• pp.1043-1053
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• 2017

In this study, genotyping was executed by using 13 microsatellite markers for genetic diversity of 224 Gorals (Saanen(88), Laoshan(67), Toggenburg(32), Alpine(12), Anglonubian(9), Jamnapari(7) and Black Bengal(4)). The number of alleles was observed 4 (INRA005) to 18 (SRCRSP23) each markers. Observed heterozygostiy ($H_{obs}$), expected heterozygosity ($H_{\exp}$) and polymorphism information content (PIC) were observed 0.482 to 0.786, 0.476 to 0.923, and 0.392 to 0.915, respectively. Principal Components Analysis(PCoA) results were similar to the results of FCA. NE-I(on-exclusion probability for identity of two unrelated individuals) was estimated at $2.47{\times}10^{-15}$. In conclusion, this study shows the useful data that be utilized as a basic data of Gorals breeding and development.

• Korean Journal of Agricultural Science
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• v.26 no.2
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• pp.33-38
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• 1999

This study was carried out to analyze the genetic polymorphisms of genomic DNA of blood and meat for conservation of the genetic resources and genetic improvement of Korean Native goat. The genetic identification between Korean Native goat and imported goat was examined using RAPD(random amplified polymorphisms DNAs) analysis with 30 Korean Native goat, 10 hybrid, 10 imported goat. 10 Korean native goat meat and 10 imported goat meat. The results obtained from this study were summarized as follows: 1. Genomic DNA from Korean native goat, hybrid and imported goat could be obtained above about 23kb size using 0.5% agarose gel electrophoresis and the ratio of optical density at 260nm to that at 280nm was between 1.7 and 2.0 using UV spectrophtometer instrument. 2. In the results of the gene identification between Korean Native goat and hybrid, and imported goat using RAPD methods with random primer of 110 kinds, only Korean native goat showed a specific band at about 369bp using a random primer OPO-19 (5'-CAA ACG TCG G-3'), but imported goat and hybrid not showed. 3. Also, in the results of the gene identification between Korean Native goat meat and imported goat meat using RAPD methods with random primer, Korean native goat only showed a specific band at about 369bp using a random primer No. 19(5'-CAA ACG TCG G-3'), but imported goat not showed.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.3
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• pp.375-382
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• 1986

This study was carried out to obtain the basic information for the clarification of spring growth habits mechanism of naked barleys. The isozyme patterns and activities of peroxidase in the young spike and leaf blade were analyzed during the differentiation and development of young spike. The characteristic differences between the normal and rosetted type were in c and g isozymes in young spike, and in i isozyme in the leaf blade. In the normal type, c and i isozymes disappeared at the stage of spi-kelet differentiation, g isozyme at the stage of flolet differentiation. But, in the rosetted type, those three isozymes remained in dark stained condition until the time of final sampling. Especially, those three isozymes were higher in the rosetted type than those in the normal type even at the stage of bract differentiation(BDS), just prior to the reproductive stage. The activities of peroxidase decreased slowly after BDS in the young spike and leaf blade in the normal type, While, in the rosetted type, increased linearly, and the degree of increasing was remarkable in the young spike. It was interesting that the degree of activities in young spike was higher in the rosetted type than that in the normal type even at BDS. From the above results, the remarkable differences of the isozyme patterns and activities at BDS between the normal and rosetted type were considered to be the physiological expression of the varieties concerned with the degree of spring growth habits.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.3
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• pp.260-269
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• 1986

This experiment was conducted to investigate the effect of mulching materials on the emergence rate, root dry weight and grain weight of sesame using variety Poong Nyun Ggae and also their effects on physical properties of soil, evapotranspiration and weed growth on the respective plots were studied. The effect of soil water holding capacity at mulching with polyethylene film and straw increased 5.4%, 2.8% to non-mulched plot respectively. The maximum soil temperature was raised up to 4$^{\circ}C$ by applying clear film and was dropped down to 7$^{\circ}C$ by straw. The minimum soil temperature was raised up to 2$^{\circ}C$ by clear film and was dropped down to 3$^{\circ}C$ by straw. In the early stage, the soil physical properties of clear film mulching were better than those of non mulching, and so was in emergence rate. In the late stage, soil strength was high at non mulching, and soil porosity, soil aeration and water infiltration rate were high at film and straw mulchings. Total root dry weight was great at clear film mulching, and root dry weight was concentrated mainly in the upper 10 cm of soil profile. The amount of weeds collected was the least at black film mulching. There were of little difference in evapotranspiration among treatments. The grain yield of sesame was increased to 57% by polyethylene film and 25% by straw mulching.